One of his routines (Euphemisms) had a surprisingly moving moral about the plight of Vietnam Vets with post-traumatic stress disorder, listing the evolutions of the term from the more simplistic, direct and brute term "shellshocked" in the first World War up to PTSD.
"I'll betcha if we had still been calling it shellshock, some of those Vietnam veterans might have gotten the help they needed at the time."
At the end of Doin' It Again, after talking about the deaths of his dogs earlier in the show, he brings out his latest dog, saying, "Give it out for Mo! Mo says hello!", smiling like a new dad, then jogging off the stage with him.